/Engine/Source/Editor/MeshPaint/Public/MeshPaintHelpers.h
Applies vertex color painting found on LOD 0 to all lower LODs.
static void ApplyVertexColorsToAllLODs ( [IMeshPaintGeometryAdapter](API\Editor\MeshPaint\IMeshPaintGeometryAdapter) & GeometryInfo, [UMeshComponent](API\Runtime\Engine\Components\UMeshComponent) * InMeshComponent )